Integrating Microelectronics Into Gas Distribution

Huebler, J.E.; Smith, Jared R W; Chicago,; Illinois.,; A, U S

doi:10.4324/9780203216156

Cited by 2 publications

(2 citation statements)

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“…Alternatives could be based on gas chromatography, thermal conductivity, gas density, 3 Author to whom any correspondence should be addressed. dielectric constant, optical properties, chemical sensing and other techniques [1]. However, for low-cost, real-time applications, these techniques may have various shortcomings including expense, the need for a calibration gas, difficulty in interpreting the results for mixtures, slow response or poor selectivity.…”

Section: Introductionmentioning

confidence: 99%

“…However, for low-cost, real-time applications, these techniques may have various shortcomings including expense, the need for a calibration gas, difficulty in interpreting the results for mixtures, slow response or poor selectivity. However, acoustic techniques for gas composition sensing may have several advantages [1,2]. First, acoustic technology is simple and rugged, resulting in sensors that are durable and repeatable.…”

Section: Introductionmentioning

confidence: 99%

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Theory for a gas composition sensor based on acoustic properties

Phillips¹,

Dain

Lueptow

2002

Meas. Sci. Technol.

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Sound travelling through a gas propagates at different speeds and its intensity attenuates to different degrees depending upon the composition of the gas. Theoretically, a real-time gaseous composition sensor could be based on measuring the sound speed and the acoustic attenuation. To this end, the speed of sound was modelled using standard relations, and the acoustic attenuation was modelled using the theory for vibrational relaxation of gas molecules. The concept for a gas composition sensor is demonstrated theoretically for nitrogen-methane-water and hydrogen-oxygen-water mixtures. For a three-component gas mixture, the measured sound speed and acoustic attenuation each define separate lines in the composition plane of two of the gases. The intersection of the two lines defines the gas composition. It should also be possible to use the concept for mixtures of more than three components, if the nature of the gas composition is known to some extent.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Theory for a gas composition sensor based on acoustic properties

Phillips¹,

Dain

Lueptow

2002

Meas. Sci. Technol.

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Analysis on hydraulic adaptability and pressure drop factors of low-pressure pipe network in coal-bed methane field

Yang

Yang²,

Jingyi³

et al. 2017

Advances in Mechanical Engineering

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Because the coal-bed methane field is influenced by factors such as low pressure, slow velocity, terrain, and condensed water, which lead to the fact that the design is different from gathering design of conventional gas field, how to make full use of wellhead pressure and maximize the wellhead pressure ability is an important link of surface engineering optimization. Therefore, we need to analyze the factors which influence the pressure drop of the gas-gathering pipe network to improve the efficiency of the coal-bed methane field surface gathering. We first contrasted the two hydraulic analysis software (PIPEPHASE and TGNET) for the analysis of coal seam gas field adaptability. By comparing the simulation results with the actual data, we found that the PIPEPHASE software is better to analyze the hydraulic situation of pipe network in the coal-bed methane field. Then, using PIPEPHASE for network simulation and contrasting the 9 state equations and 26 kinds of pressure drop formula calculation results, SRK state equation and BBM pressure drop formula are recommended. We analyze the inlet temperature, pressure, and other nine factors affecting gas extraction pipeline pressure drop according to the practical experience and put forward the suggestions as follows: (1) in order to reduce the pressure drop and increase the ability of pipeline, burying pipeline under the permafrost and improving the inlet pressure are suggested; (2) The higher the inlet pressure, the more obvious the pipeline efficiency influences the pipeline pressure drop, so the inlet pressure and pipeline efficiency should be reasonably controlled in order to reduce the pressure drop; (3) The higher the pipeline pressure, the greater the wall roughness influences the pipeline pressure drop, also the greater the pressure can damage, so we should try to use small wall roughness materials.

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Integrating Microelectronics Into Gas Distribution

Cited by 2 publications

References 0 publications

Theory for a gas composition sensor based on acoustic properties

Theory for a gas composition sensor based on acoustic properties

Analysis on hydraulic adaptability and pressure drop factors of low-pressure pipe network in coal-bed methane field

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